Brazilian submarine Tonelero (S21) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Brazilian submarine Tonelero (S21)" in English language version.

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bbc.co.uk

"Brazil investigates sub sinking". BBC News. 26 December 2000. Retrieved 27 February 2020.

Moore, John, ed. (1977). Jane's Fighting Ships 1977-78. Jane's Fighting Ships (80th ed.). London: Jane's Yearbooks. p. 44. ISBN 0531032779. OCLC 18207174.
Sharpe, Richard, ed. (1998). Jane's Fighting Ships 1998-99. Jane's Fighting Ships (101st ed.). Coulsdon, Surrey: Jane's Information Group. p. 58. ISBN 071061795X. OCLC 39372676.